How do I update my birth date on Apple ID?

I have forgotten my password and selected "Verify Security Questions" to reset the password. However, the system is stating that I'm entering my birth date in wrong. I managed to guess my password correctly after a few more attempts, but I would like to update my birth date as well. After logging into my profile, I did not see a location where my birth date is housed. Can anyone tell me how to update my birth date?